Flexible and elastic shaft-coupling.



No. 893,794. PATENTED JULY 21, 1908.

L. GIRARDOT. FLEXIBLE AND ELASTIC SHAFT COUPLING.

APPLICATION FILED K0120, 1905.

UNITED STATES PATENT OFFICE;

LEo'NoE GIRARDOT, or PUTEAUX, FRANCE.

FLEXIBLE AND ELASTIC SHAFT-COUPLING.-

Specification of Letters Patent.

Patented July 21, 1908.

\ Application filed November 20, 1905. Serial No. 288,284.

tween two rotatable shafts arranged end to end and one of which is intended to drive the other, while admitting the possibility of slightly inclining one shaft with regard to the other. This special connection canin many cases with advantage replace a Cardan or universal-joint,since while allowing, like the latter,relative displacement of the two shafts, it moreover insures elastic drivin without shock, at each starting or at eac variation of s eed. This joint is, for example partic arly adapted for use in the semi-circular section, intersected at intervals transmission gear of automobile vehicles,

between the motor shaft and the speed gear shaft.

'In the annexed drawing, Figures 1 and 2 represent one form of joint constructed according to this invention in-longitudinal section and sectional front view respectively. The flexible and elastic joint compri s two plates a and 5, one being fixed to the shafts to be driven, and the other to the motor or driving shaft (1. These two plates are laced closely together and are connected wit each other by a central universal joint formed by spherical bosses 1 and 2 fitting one within the other, and by the screw f, the head of which is also spherical. At its circumference, each of said-plates has a wide groove 3 or 4 of by triangular projections or teeth 5 or 6, formed in one with the respective plate. These projections or teeth are equidistant, and' ;the lates are so placed together that each toot of one of them is placed midway between two teethfof the other plate, and a helical spring 9 is placed between each two adjacent teeth, one of which belongs to one plate and the other to the other plate. The constructionis completed by disks h and 71/ inserted between the teeth of the plates and which are threade all the s rings and disks, and which allows of rapi ly placing these parts in osition and removing same. To permit of p acing said ring in the axis of the chamber formed by the union of the the ends of the sprin s g, and by a ring j on I I semi-circular grooves 3 and 4, each tooth 5 or 6 is provided with an aperture 7c.

' It will be understood that with a construction of this kind, the flexibility of the connecat each starting, the teeth of the plate fixed to the driving shaft act on' the teeth of the plate fixed to the driven shaft, by means of adapted to be fixed respectively to the adjacent ends of the shafts to be con led, there bein two sets of teeth of trian ar section shaft-coupling com? I prising in combination two plates 1 and l),

5 an 6 made respectively integral with said 1 plates at their circumference and meshing. with each other without'making contact,

each of said teeth being recessed in its outer edge,-s rings 9 arranged between the side faces 0 successive teeth, washers h and h located between the ends of the springs and the said faces of the teeth, a movable ring on which are threaded all the springs an washers, said ring lying in the recesses in the teeth, there bein spherical bosses 1 and 2 formed res active in the plates a and b, and a spherica headed screw f screwed into one of the plates a and adapted to connect both plates together though admitting their slight inclination one with re ard to the other, sub-.

set forth.

LEONOE GIRARDOT. I

Witnesses:

ANTOINE LAVOIX, HANSON O. Coxs.

60 tion is insured by the ball-joint; 'moreover, 

